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Retirement and Benefit Plans | 12 Months Ended
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Dec. 31, 2024
Retirement Benefits [Abstract] |
Retirement and Benefit Plans | Retirement and Benefit Plans Our retirement plans consist of noncontributory defined benefit pension plans, contributory defined contribution savings plans, and deferred compensation plans. Defined Benefit Plans Some of our current or former employees are covered by noncontributory defined benefit pension plans. These plans are nonqualified salaried pension plans, which were frozen so that no future benefits have accrued since December 31, 2009. We recognize and record the underfunded status of our defined benefit pension plans in "Accrued liabilities, Compensation and benefits" and "Other, Compensation and benefits" on our Consolidated Balance Sheets. The total accumulated benefit obligation for all unfunded nonqualified defined benefit pension plans was $2.2 million and $2.6 million at December 31, 2024 and 2023, respectively. In addition, we recognize changes in funded status in the year the changes occur through other comprehensive income (loss). For both the years ended December 31, 2024 and 2023, amounts recognized in accumulated other comprehensive loss related to our nonqualified defined benefit pension plans were immaterial. Furthermore, the components of net periodic benefit cost and other amounts recognized in other comprehensive income related to our nonqualified defined pension plans for the years ended December 31, 2024 and 2023 were immaterial. Defined Contribution Plans We sponsor contributory defined contribution savings plans for most of our salaried and hourly employees, and we generally provide company contributions to the savings plans. We contribute 4% of each salaried participant's eligible compensation to the plan as a nondiscretionary company contribution. In addition, for the years that a performance target is met, we contribute an additional amount of the employee's eligible compensation, depending on company performance and the employee's years of service. During the years ended December 31, 2024, 2023, and 2022, company performance resulted in additional contributions in the range of 2% to 4% of eligible compensation. The company contributions for union and nonunion hourly employees vary by location. Company contributions paid, or to be paid, to our defined contribution savings plans for the years ended December 31, 2024, 2023, and 2022, were $37.3 million, $33.5 million, and $31.3 million, respectively. Defined Contributory Trust We participate in a multiemployer defined contributory trust plan for certain union hourly employees. As of December 31, 2024, 2023, and 2022 approximately 740, 730, and 740, respectively, of our employees participated in this plan. Per the terms of the representative collective bargaining agreements, we were required to contribute 4.5% of the employee's earnings during 2024, 2023, and 2022. Company contributions to the multiemployer defined contributory trust plan were $2.1 million, $1.8 million, and $2.0 million, respectively, for each of the years ended December 31, 2024, 2023, and 2022. After required contributions, we have no further obligation to the plan. The plan and its assets are managed by a joint board of trustees. Deferred Compensation Plans We sponsor deferred compensation plans. Under the plans, participating employees and directors irrevocably elect each year to defer receipt of a portion of their compensation. A participant's account is credited with imputed interest at a rate equal to 130% of Moody's Composite Average of Yields on Corporate Bonds. Participants may receive payment of their deferred compensation plan balance in a lump sum or in monthly installments over a specified period of years following the termination of their employment with the company. In addition, subject to plan revisions that became effective January 1, 2019, employee participants may also receive distributions of their deferred compensation accounts while still employed by the company. The deferred compensation plans are unfunded; therefore, benefits are paid from our general assets. For the years ended December 31, 2024, 2023, and 2022, we recognized $2.4 million, $2.1 million, and $1.4 million, respectively, of interest expense related to the plans. At December 31, 2024 and 2023, we had liabilities related to the plans of $4.5 million and $2.2 million, respectively, recorded in "Accrued liabilities, Compensation and benefits" and $33.0 million and $30.5 million, respectively, recorded in "Other, Compensation and benefits" on our Consolidated Balance Sheets.

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